. >> the united states will do what we must to prevent iran from obtaining a nuclear weapon. >> reporter: last year's meeting president obama met separately with more than a dozen world leaders. this year he had no such meetings scheduled prompting criticize mg he's more focused on campaigning than governing. hillary clinton met with 20 world leaders in his place. diane. >>> thank you so much from the white house, jake tapper tonight. >>> knew we move on to football. split second call that had everyone in arms today. professional football referees are locked out in a contract battle with the nfl and their replacements have been called in pretty amateur convenient venue. last night was not pretty. here's dan harris. >> reporter: there are eight seconds on the clock the seattle seahawks are losing to the green bay packers. and the seattle quarterback throws a hail mary. >> fought for by tate with jennings, simultaneous. who has it? who will they give it to? touchdown! >> reporter: look at what the two replacement referees do. one of them rules it a touchdown while the other says no. >> to